US3337469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen-embrittlement-inhibition with propargyl benzylamine and ethylene oxide adduct of phenylbutynol
Assignee: Airco Inc
•
Filing: 1964-04-15
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Granted: 1967-08-22
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Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Davidowich George
- 👤 Morton W Leeds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:13
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
AN AQUEOUS SOLUTION OF SULFURIC ACID CONTAINING AN EFFECTIVE HYDROGEN-EMBRITTLEMENT-INHIBITING AMOUNT OF PROPARGYLBENZYLAMINE AND AN ETHYLENE OXIDE ADDUCT OF PHENYLBUTYNOL IN THE RATIO OF ABOUT 2:1 TO 1:2, SAID ADDUCT CONTAINING AN AVERAGE OF ABOUT 3 TO 30 ETHYLENE OXIDE UNITS.
Claim 2
Dependent Claim
41 words
AN AQUEOUS SOLUTION OF SULFURIC ACID CONTAINING AN EFFECTIVE HYDROGEN-EMBRITTLEMENT-INHIBITING AMOUNT OF PROPARGYLBENZYLAMINE AND AN ETHYLENE OXIDE ADDUCT OF PHENYLBUTYNOL IN THE RATIO OF ABOUT 2:1 TO 1:2, SAID ADDUCT CONTAINING AN AVERAGE OF ABOUT 3 TO 30 ETHYLENE OXIDE UNITS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |